Automann Air Brake Auto Slack Adjuster

Automann Air Brake Auto Slack Adjusters: Precision Braking for Heavy-Duty Applications

When it comes to maintaining safe, reliable stopping power on commercial trucks and trailers, few components are as critical as the automatic slack adjuster. Automann has built a strong reputation in the heavy-duty aftermarket for delivering air brake auto slack adjusters that meet or exceed OEM performance standards — giving fleets, repair shops, and independent operators the confidence that every adjustment cycle is handled precisely and automatically.

What Makes Automann Slack Adjusters Stand Out

OE-quality engineering at aftermarket value. All Automann products are manufactured with in-house engineering expertise and in compliance with OE performance standards, ensuring the best quality at the best possible price point for customers. For a safety-critical component like a slack adjuster, that engineering pedigree matters. With ISO 9001:2015 certified operations, you can rely on Automann for high quality and an expanding range of innovative products.

Automann's automatic slack adjusters continuously maintain the correct clearance between the brake lining and drum, reducing the need for manual adjustments and minimizing brake wear. Their robust construction ensures durability and dependable performance even in harsh operating environments, making them an ideal choice for fleets aiming to maximize uptime and safety.

A Range of Types to Cover Your Fleet

Automann's automatic slack adjuster lineup spans several widely used OEM-style configurations, ensuring broad compatibility across commercial vehicle platforms:

• Gunite Type (e.g., 138.1011FC): A premium Gunite-type slack adjuster engineered for heavy-duty trucks and trailers equipped with air brake systems, built to exacting OEM specifications with a 1-1/2" spline diameter and 10 splines for a precise fit.
• Bendix Type (e.g., 137.1030): A Bendix-type slack adjuster available in a 6-inch arm configuration , designed as a direct-fit replacement for vehicles originally equipped with Bendix-style adjusters.
• Haldex Type (e.g., 133.1031, 135.S1034): A Haldex-type self-setting slack adjuster , covering applications that call for Haldex-style fitment across a wide range of truck and trailer configurations.
• Crewson Type (e.g., 136.2830): A premium Crewson-type slack adjuster designed for heavy-duty trucks and trailers equipped with air brake systems.
• Meritor Type (e.g., 139.2831): A direct-replacement option for Meritor-style applications, rounding out Automann's extensive coverage of the most common slack adjuster platforms in North American fleets.

Broad Coverage, Trusted Fitment

Based in Somerset, NJ, Automann is a premier distributor of aftermarket truck and trailer parts, offering more than 30,000 products ranging from air brake and wheel parts to steering components, supplied to regional warehouse distributors, repair shops, and retailers across the United States. The Automann Assured mark is your guarantee of engineering expertise, state-of-the-art technology, and rigorous testing.

Whether you're maintaining a mixed fleet of Class 8 semis, managing a dedicated trailer pool, or running a busy repair shop, Automann's automatic slack adjusters are engineered to deliver consistent brake stroke control and reduce roadside inspection failures. Explore the full Automann brand catalog or browse all air brake auto slack adjusters to find the right fit for your application.